Checks After Failover Setup

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You can check if WAL data is streaming by running on the primary this command:

   watch -d 'ps auxww|grep [s]treaming'

You will see something like this:

 postgres 25972  0.2  0.1 103012  4912 ? Ss 15:24 0:09 postgres: wal sender process postgres streaming 26E/6A01AEF0

Where the last few hex digits will be changing if things are okay. (They will change fast on a busy system and possibly very slowly on a lightly-loaded one.)